The length of a spring when it's at rest is measured to be 0.56 centimeter. How many significant figures are there in this measurement?

True or false, the three major scales used to measure earthquakes are mercalli scale, richter scale and magnitude scale

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

What type of reaction fuels the processes seen here?